:root { --bg: #fff; --fg: #1a1a1a; --muted: #666; --link: #0b5cad; --rule: #e5e5e5; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #121212; --fg: #e8e8e8; --muted: #9a9a9a; --link: #7cb7ff; --rule: #2a2a2a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
.brand { font-size: 14px; font-weight: 600; letter-spacing: .02em; color: var(--muted); margin: 0 0 8px; }
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
a { color: var(--link); }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 14px; color: var(--muted); }